250 FLOJIA OP TEXAS. 



2. PRUNUS. Calyx-limb dcciduaus. Stone even, or grooved on the rharglns. 



SuB-ORDEK III. Rosaceae. Calyx 3-5-cleft, the lobes 

 often alternating with as many bracts, free from the 1-sev- 

 eral ovaries. Style lateral or terminal. Fruit a 1-10-seeded 

 follicle, or a 1-seeded achenium. Herbs or shrubs. Leaves 

 mostly lobed or compound. 



* Fruit a l-IO-seeded follicle. 



Petals obovate or roundish, imbricated in the bud Spir^a. 



linear-lanceolate, convolute in the bud GnxENiA- 



** Fruit a 1-seeded achenium. 



t Fruiting calyx dry, the lobes mostly valvate in the bud. Acheniafew^ 

 or num£rous and collected in the bud. 



tt Calyx-tube contracted (except Neviusia). Achenia 1-4. 



Petals none. Stamens indefinite. Calyx lobes serrate Nbtiubia. 



5. 5-15. bristly Agrimonia. 



none. 4. Style terminal Sanguisorba. 



none. 1-4. lateral Alchemilla. 



tt tt Calyx open, bracted. Stamens and dry achenia numerous^ 

 the latter rarely 2-A. 



= Seeds erect. 



Styles persistent. Achenia numerous Geum. 



deciduous. 2-G Waldsteinia. 



= = Seeds susjjended or ascending. 



Receptacle flat or convex, dry Potentilla, 



conical, enlarged and fleshy in fruit .Fragaria. 



tt tt tt Calyx open, braclless. Stajnens and juicy achenia num,eroits. 



Achenia crowded on the conical receptacle RuBUS. 



tt Calyx-tube fleshy, urn-shaped ; the lobes imbi^icated in the bud. Achenia numer- 

 ous, inserted on the receptacle which lines the inside of the calyx-tube. 



• Achenia dry and hairy. Prickly shrubs Rosa. 



SuR-ORDER IV. Pomeae. Calyx including and coher- 

 ing with the 1-5 ovaries, very thick and fleshy in fruit. 



